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JP2001299762

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2001299762
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic image display method, an ultrasonic diagnostic apparatus, and an ultrasonic probe,
and more particularly, to a three-dimensional feeling capable of discriminating between a front
side portion and a back side portion of an object to be imaged. The present invention relates to
an ultrasonic image display method for displaying an ultrasonic image having an ultrasonic wave,
an ultrasonic diagnostic apparatus, and an ultrasonic probe suitable for the ultrasonic diagnostic
apparatus.
[0002]
2. Description of the Related Art FIG. 8 is a block diagram showing an example of a conventional
ultrasonic diagnostic apparatus. In the ultrasonic diagnostic apparatus 500, the ultrasonic probe
10 and the transmission / reception unit 2 to which the diffusion lens 51 is attached transmit
ultrasonic pulses to the subject, receive ultrasonic echoes, and transmit sound wave signals in B
mode. Pass to processing unit 3. The B mode processing unit 3 generates B mode image data and
passes it to a DSC (Digital Scan Convertor) 4. The DSC 4 images the B-mode image data to
generate an ultrasound image, and passes the ultrasound image to the display device 5. The
display device 5 displays the ultrasound image on the screen.
[0003]
04-05-2019
1
As shown in FIG. 9, the diffusion lens 51 is an additional acoustic lens for diffusing ultrasonic
waves in the thickness direction of the ultrasonic probe 10. That is, in the state where the
diffusion lens 51 is not attached, the sensitivity region S 'is narrow in the direction (y direction)
perpendicular to the scanning direction (x direction). However, in the state where the diffusion
lens 51 is attached When viewed from the central axis ZL in the z direction passing through the
center of the grip portion 11 of the probe 10, the sensitivity region S51 is symmetrical in a
direction perpendicular to the scanning direction. As a result, for example, the whole of the fetus
F in the amniotic fluid is in the sensitivity region S51. θ is a rotation angle when the ultrasonic
probe 10 is oscillated around the central axis ZL (0 ° when the scanning direction is the x
direction). This type of ultrasonic probe may be called a thickness direction diffusion probe.
[0004]
When the operator swings the ultrasonic probe 10 around the central axis ZL in FIG. 8, the whole
image of the fetus F seen as seen through is swung, and thereby the whole image of the fetus F
Gives a three-dimensional effect. FIG. 10 illustrates a scanning state when the ultrasonic probe
10 is swung left and right in the vicinity of the rotation angle θ = 0. The velocity V 'is equal to
the speed at which the outer edges on both sides of the sensitivity region S51 viewed in the
thickness direction move relative to the fetus F. FIG. 11 schematically illustrates an ultrasound
image I51 displayed corresponding to the scanning state of FIG. The leg L entering in the vicinity
of one outer edge of the sensitivity region S51 and the head H entering in the vicinity of the
other outer edge of the sensitivity region S51 swing at the same speed Va '.
[0005]
In the above-described conventional ultrasonic diagnostic apparatus 500, when the ultrasonic
probe 10 is swung to display an ultrasonic image I51 capable of obtaining a three-dimensional
effect, the front side of the object to be imaged is There is a problem that it is difficult to
distinguish between the part and the back part. That is, in the example of FIG. 11, since the leg L
and the head H of the fetus F are partially overlapped and oscillate at the same speed Va ', it is
difficult to distinguish between them. Therefore, an object of the present invention is to provide
an ultrasonic image display method for displaying an ultrasonic image having a threedimensional effect that can distinguish between the front side portion and the back side portion
of an imaging target, an ultrasonic diagnostic device, and the ultrasonic diagnostic device
Providing an ultrasonic probe suitable for the present invention.
04-05-2019
2
[0006]
SUMMARY OF THE INVENTION In a first aspect, the present invention is characterized in that
the sensitivity region is asymmetric with respect to a central axis vertically penetrating the center
of the grip when the ultrasonic probe is in the upright position. An ultrasonic image display
method characterized in that an imaging target is scanned by a distributed ultrasonic probe, an
ultrasonic image which changes in accordance with the movement of a scanning surface is
generated, and the ultrasonic image is displayed. Do. In the ultrasonic image display method
according to the first aspect, since the imaging target is scanned by the ultrasonic probe having
an asymmetric sensitivity region, the ultrasonic probe is swung or rotated to scan the scanning
surface relative to the imaging target. When changing the angle, the speed near the outer edge of
the sensitivity area on the relatively wide side and the area near the outer edge of the sensitivity
area on the relatively narrow side are different with respect to the imaging target when viewed
from the central axis of the grip It will move by As a result, in the ultrasonic image having a
three-dimensional effect as seen through, the image range corresponding to the front side
portion of the imaging target and the image range corresponding to the back side portion of the
imaging target move at different speeds. It becomes. That is, it is possible to distinguish between
the near side portion and the far side portion of the imaging target by the difference in the speed
of movement on the screen.
[0007]
In a second aspect, in the ultrasonic image display method according to the first aspect, the
present invention is characterized in that the asymmetric sensitivity region is asymmetrical with
respect to the thickness direction of the ultrasonic probe. Provide an image display method. In
the ultrasonic image display method according to the second aspect, the sensitivity region is
made asymmetric in the thickness direction of the ultrasonic probe, so that the field of view of
the ultrasonic image in the lateral direction of the screen can be made the same as that in the
prior art.
[0008]
According to a third aspect of the present invention, there is provided an ultrasonic probe having
a sensitivity region asymmetric with respect to a central axis vertically penetrating the center of
the grip when the ultrasonic probe is in an upright position, Ultrasonic image generating means
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3
for scanning the inside of a subject using an ultrasonic probe to generate an ultrasonic image,
and scan surface following ultrasonic image display for displaying an ultrasonic image that
changes in accordance with the movement of the scanning surface And an ultrasonic diagnostic
apparatus characterized by comprising: According to the ultrasonic diagnostic apparatus of the
third aspect, the ultrasonic image display method of the first aspect can be suitably implemented.
[0009]
In a fourth aspect, the present invention provides the ultrasonic diagnostic apparatus according
to the third aspect, wherein the ultrasonic probe diffuses ultrasonic waves asymmetrically as
viewed from the central axis, and a diffusion slit An ultrasonic diagnostic apparatus is provided,
wherein any one of a plate and an acoustic lens for sound ray focusing is attached. In the
ultrasonic diagnostic apparatus according to the fourth aspect described above, the ultrasonic
probe is attached to any one of the diffusion lens, the diffusion slit plate, and the acoustic lens for
sound ray focusing, from the central axis of the grip portion Since the ultrasonic waves are
asymmetrically diffused as viewed, the ultrasonic probe body can form an asymmetric sensitivity
region in the conventional configuration.
[0010]
In a fifth aspect, the present invention scans the inside of an object in a state in which an
ultrasonic probe and a sensitivity region asymmetric with respect to a central axis penetrating
the center of the holding portion of the ultrasonic probe are formed. And, a scanning means for
moving the scanning surface, an ultrasonic image generating means for generating an ultrasonic
image based on the result of the scanning, and a scanning surface following for displaying an
ultrasonic image which changes following the movement of the scanning surface An ultrasonic
diagnostic apparatus is characterized in that it comprises ultrasonic image display means. In the
ultrasonic diagnostic apparatus according to the fifth aspect, it is possible to display an ultrasonic
image having a three-dimensional effect that can distinguish between the front side portion and
the back side portion of the imaging target. In addition, since the scanning surface is moved
electronically, it is not necessary to move the ultrasonic probe, so that it is possible to prevent
the subject from feeling discomfort and to reduce the burden on the operator.
[0011]
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4
According to a sixth aspect of the present invention, in the ultrasonic diagnostic apparatus
according to any one of the third to the fifth aspects, the asymmetric sensitivity region is
asymmetric with respect to the thickness direction of the ultrasonic probe. An ultrasonic
diagnostic apparatus characterized in that According to the ultrasonic diagnostic apparatus of
the sixth aspect, the ultrasonic image display method of the second aspect can be suitably
implemented.
[0012]
According to a seventh aspect of the present invention, there is provided an ultrasonic probe
characterized in that the ultrasonic probe has a sensitivity region asymmetric with respect to a
central axis vertically penetrating the center of the grip when the ultrasonic probe is in the
upright position. Provide a tentacle. The ultrasonic probe according to the seventh aspect is
suitable as an ultrasonic probe used in the ultrasonic diagnostic apparatus according to the third
aspect.
[0013]
In an eighth aspect, in the ultrasonic probe according to the seventh aspect, the present
invention is characterized in that the asymmetric sensitivity region is asymmetric with respect to
the thickness direction of the ultrasonic probe. Provide a probe. The ultrasonic probe according
to the eighth aspect is suitable as an ultrasonic probe used in the ultrasonic diagnostic apparatus
according to the third aspect.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in
more detail by way of embodiments shown in the drawings. The present invention is not limited
by this.
[0015]
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5
First Embodiment FIG. 1 is a block diagram showing an ultrasonic diagnostic apparatus
according to a first embodiment of the present invention. The ultrasonic diagnostic apparatus
100 includes an ultrasonic probe 10 in which a diffusion lens 1 is attached to one side of a
transducer array surface, a transmitting / receiving unit 2, a B mode processing unit 3, a DSC 4,
and a display device 5. It is equipped. The ultrasonic probe 10 forms sensitivity regions S1 and
S2 having asymmetrical thickness with respect to the central axis ZL in the z direction which
penetrates the center of the grip portion 11 of the ultrasonic probe 10 (about this point Will be
explained in detail later).
[0016]
FIG. 2 is an explanatory view of the ultrasound probe 10. A diffusion lens 1 is attached to one
side of the transducer array surface of the ultrasonic probe 10. The diffusion lens 1 is an
additional acoustic lens for diffusing ultrasonic waves in the thickness direction of the ultrasonic
probe 10. That is, the sensitivity region S1 on the side where the diffusion lens 1 is attached as
viewed from the central axis ZL spreads in the direction (y direction) perpendicular to the
scanning direction (x direction), whereas the side where the diffusion lens 1 is not attached The
sensitivity region S2 of the lens hardly spreads. As a result, for example, the whole of the fetus F
in the amniotic fluid is in the sensitivity regions S1 and S2. θ is a rotation angle when the
ultrasonic probe 10 is oscillated around the central axis ZL (0 ° when the scanning direction is
the x direction).
[0017]
When the operator swings the ultrasonic probe 10 around the central axis ZL of FIG. 2 (which
may be a rotation that does not return to the original rotation angle), the whole image of the
fetus F seen as transparent can be seen. The rocking motion causes a three-dimensional effect to
be obtained from the whole image of the fetus F. FIG. 3 exemplifies a scanning state when the
ultrasonic probe 10 is swung left and right in the vicinity of the rotation angle θ = 0. The
velocity V1 is the speed at which the outer edge of the sensitivity region S1 moves in the
thickness direction relative to the fetus F. The velocity V2 is a velocity at which the outer edge of
the sensitivity region S2 moves in the thickness direction relative to the fetus F, which is slower
than the velocity V1. FIG. 4 schematically illustrates an ultrasound image I1 displayed
corresponding to the scanning state of FIG. The speed V2a at which the head H swinging in the
vicinity of the outer edge of the sensitivity region S2 is slower than the speed V1a at which the
leg L swings in the vicinity of the outer edge of the sensitivity region S1. As described above, it is
possible to distinguish between the leg L and the head H which are divided into the near side and
04-05-2019
6
the far side from the difference in the speed of swinging on the screen. It may be regarded as the
near side).
[0018]
According to the ultrasonic diagnostic apparatus 100 according to the first embodiment
described above, the ultrasonic probe 10 forming the asymmetric sensitivity regions S1 and S2 is
swung or rotated to thereby form the near side portion of the imaging target It is possible to
make the speed of swinging in the screen different in the back side portion (the leg L and the
head H of the fetus F in the example of FIG. 4), and it becomes possible to easily discriminate
between the two.
[0019]
In addition, instead of attaching the diffusion lens 1 to the ultrasonic probe 10, the following
configurations (1) to (3) may be used.
(1) As shown in FIG. 5, an ultrasonic probe is provided with a slit plate 21 having a slit which is
long in the x direction and short in the y direction and in which at least one side is inclined in the
z direction 10 may be used. In this case, due to the inclination of the slit in the z direction,
sensitivity regions S1 and S2 asymmetric in the thickness direction are formed. (2) As shown in
FIG. 6, an ultrasonic probe 10 may be used in which an acoustic lens 31 for focusing a ray for
focusing the ray in the y direction is attached to one side. In this case, the thickness of the
sensitivity region S1 to which the acoustic lens 31 for sound ray focusing is not attached is larger
than the thickness of the sensitivity region S2 to which the acoustic lens 31 for sound ray
focusing is attached. (3) The transducers of the ultrasonic probe may be arranged such that the
transmission / reception wavefronts thereof are inclined with respect to the orthogonal plane of
the central axis ZL of the grip portion 11.
[0020]
Also, instead of manually swinging (or rotating) the ultrasound probe 10, it may be automatically
swung (or rotated) using a driving force of a motor or the like. An automatic swing mechanism of
this type is disclosed, for example, in Japanese Patent Application Laid-Open No. 10-24036.
04-05-2019
7
[0021]
Second Embodiment FIG. 7 is a block diagram showing an ultrasonic diagnostic apparatus
according to a second embodiment of the present invention. The ultrasonic diagnostic apparatus
200 includes a two-dimensional array type ultrasonic probe 201, a scanning surface thickness
setting unit 22a, a scanning surface rotation angle changing unit 22b, a scanning surface control
unit 23, a transmitting / receiving unit 24, and A mode processing unit 3, a DSC 4, and a display
device 5 are provided.
[0022]
The two-dimensional array type ultrasound probe 201 has transducers arranged in a twodimensional array, and can transmit ultrasound pulses in any direction by adjusting drive pulses
applied to the respective transducers. The scanning surface thickness setting unit 22a sets the
thickness of the scanning surface so as to be the combined thickness of desired asymmetric
sensitivity regions S1 and S2. The scanning surface rotation angle changing unit 22b sequentially
changes the rotation angle so that the rotation angle θ of the scanning surface changes
continuously. The scanning surface control unit 23 provides the transmitting / receiving unit 24
with a control signal for instructing the transmission surface to have the set scanning surface
thickness and to have the set rotation angle θ. The transmitting / receiving unit 24 supplies the
delayed (or not delayed) driving pulse to each transducer of the two-dimensional array type
ultrasound probe 201 according to the control signal.
[0023]
According to the ultrasonic diagnostic apparatus 200 according to the second embodiment
described above, by controlling the drive pulses supplied to the two-dimensional array type
ultrasonic probe 201, the asymmetric sensitivity regions S1 and S2 are formed. Since the rotation
angle θ of the scanning surface can be changed, a diffusion lens (1 in FIG. 1) or the like for
diffusing the ultrasonic wave in the thickness direction becomes unnecessary. In addition, since it
is not necessary to swing or rotate the two-dimensional array type ultrasound probe 201, it is
possible to prevent an object from being uncomfortable and to reduce the burden on the
operator.
[0024]
04-05-2019
8
According to the ultrasonic image display method, the ultrasonic diagnostic apparatus and the
ultrasonic probe of the present invention, the ultrasonic probe having an asymmetric sensitivity
region performs scanning, so that the ultrasonic probe Can be displayed as an ultrasonic image
that can be distinguished by the difference in the speed of movement on the screen when the
front side portion and the back side portion in the viewing direction are oscillated or rotated.
04-05-2019
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